JPH0135997B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a louver type Venetian blind, particularly a vertical type in which a drive shaft passes through a holder, and at least one helical groove is formed on the drive shaft, and the holder is moved by the rotation of the drive shaft. Regarding Venetian blinds. This moving holder includes a louver holder in the axial direction of the drive shaft and a tension holder for evenly distributing the louvers on the window surface and arranging a series of louvers on both the left and right sides, each louver holding one louver. It is supported by a louver holder. The holder also has a support holder which prevents the drive shaft from sagging in the region of the drive shaft where neither the louver holder nor the tension holder reach. They are individually aligned and held at predetermined points along the headrail using the stopper pieces and the stopper pieces provided on the headrail surface.

Venetian blinds in which the supporting holder is moved by the drive shaft, since in conventional Venetian blinds the louvers can be rotated by the drive shaft by more than 150° without axial movement around the vertical axis. In this case, while the louver is rotating around a vertical axis perpendicular to the drive shaft, the support holder moves along the drive shaft, and the support holder hits the louver holder or tension holder that meets the direction of movement. The disadvantage is that it imposes undesirable axial displacement forces on the louver holder or tension holder.

The present invention solves these difficulties, and for this purpose, the present invention includes a head rail, a plurality of louvers, a plurality of louver holders that hold each louver and are movable along the head rail, and a louver holder. a drive shaft that moves along the head rail; a plurality of supporting holders that support the drive shaft;
at least one tension holder for moving the louver holder along the head rail to open and close the blind; and first stop pieces installed at different heights on the sides of the plurality of supporting holders;
A plurality of second restraining pieces are provided on the side wall of the head rail and are installed at different heights and correspond to the first restraining pieces installed on the supporting holder, and the tension holder and the supporting holder A vertical Venetian blind configured so that when engaged with the holding body, the first and second restraining pieces come into contact and can brake the tension holding body;
It is characterized by:

The structure and operation of embodiments of the present invention will be explained below with reference to the accompanying drawings.

As shown in FIG. 1, a vertical louver Venetian blind is provided with a head rail 10 having a track 10a set on the inside surface of the wall, only one of which is shown. This truck 10a
supports a plurality of holding bodies 12 by rollers 35,
Each holder carries a louver 13 mounted downward and rotatably suspended by a louver holder or hook 33.

As is common practice, when the blind is closed, the louver 13 and the corresponding holder 12 are divided into two groups on the left and right, and when the blind is opened, the two groups on the left and right are combined at the end of the rail 10. They are grouped and divided into groups.

Attached to the head rail 10 are support blocks 15a for a drive shaft 15 provided at both ends of the blind, and an intermediate support holder 14 through which the drive shaft 15 passes. This intermediate supporting holder 14 is provided to completely prevent the drive shaft 15 from sagging (drooping). The drive shaft 15 also passes through a pair of tension holders 11 corresponding to each group of louver holders 12. This drive shaft 15 is provided with three spiral grooves. Groove 16 in half of drive shaft 15
is opposed to the groove 17 on the surface of the other half of the drive shaft 15. Each of the tension holders 11 is provided with means for engaging with three helical grooves 16 or 17 of the drive shaft 15, so that the tension holders 11 slide along the three helical grooves 16 or 17 when the drive shaft rotates. Details of this mechanism will be described later. As is clear from FIG. 1, when the drive shaft 15 rotates,
One tension holder 11 (the one on the right in the figure) moves away from the other tension holder (the one on the left) because the three helical grooves 16 are oriented in different directions to the three helical grooves 17. Move to the right.
Each tension holder 11 also has a corresponding louver holder 12
The first louver holder 12 of each set is connected to the adjacent louver holder 12. Thus, as the tension retainer 11 moves from the center towards the end of the headrail 10, the first corresponding louver retainer of each set moves together until the next louver retainer is reached, at which point the first corresponding louver retainer is moved. After reaching the louver holder 12 of No. 3, the louver holder 1 is further moved along the rail, and each louver holder 1 is moved one after another.
Pick up 2 and move to the end to open the blind. When the drive shaft 15 is driven in the opposite direction, the tension holder 11 and the first louver holder 12 to which it is fixed are moved from the end position towards the central position. When the tension holder 11 and the louver holder 12 to which it is connected move together toward the center by a predetermined distance, the louver holder 12 engages with the end 19a of the spacer 19.
Each louver holder 12, except the first one connected to the tension holder 11, is fixed at one end to a spacer 19, an elongated metal strip extending centrally towards the next adjacent louver holder 12. There is. This elongated metal strip spacer 19
determines the distance between adjacent louver holders 12 and thus the distance between louvers 13. This spacer 1
9 is the next adjacent louver holder 1 toward the center.
It is located on the side of No. 2 and penetrates into the sliding opening. When the louver holder 12 reaches the end of the spacer 19, it engages with the curved blade portion 19a and pulls the next succeeding louver holder 12. This subsequent louver holder 12 is fixed to the opposite end (opposite end 19a) of the spacer 19. In this way, when the blind is closed, the intervals between the individual louvers 13 are equalized, and at the same time, when the blind is opened, each louver 13 is pulled together in pairs at both ends of the blind.

A bead chain pulley 1 is attached to one end of the drive shaft 15.
8a is fixed, and a bead chain 18 for operating the blind by rotation of a drive shaft 15 is wound around this pulley.

Referring to FIGS. 2 and 3, the tensile retainer 1
It can be seen that 1 includes a holder casing 320 with an opening 320a through which the drive shaft 15 passes.
The sleeve 321 surrounds the drive shaft 15 and has at least one end shaped like three inward ears 321a, 3 that engage the three grooves 16 of the drive shaft 15.
21b and 321c. The sleeve 321 and the drive shaft 15 are securely connected. One end of the sleeve 321 is provided with a flange 322 having integral teeth 323 extending axially in the opposite direction. Also adjacent to the other end, the sleeve 321 is provided with a groove 324. The coil type spring 329 is the sleeve 3
21 and the spring itself is warm 325
It is surrounded by bosses 327.

When assembling parts of the swivel clutch mechanism, the worm 325 is first inserted into the concentric sleeve 32.
Teeth 323 on the sleeve 321 and teeth 327a of the boss 327 are engaged with each other in the axial direction. Worm 325 has a radially inwardly projecting shoulder 328 for a loose fit around sleeve 321 . The cylindrical inner wall 327b of the boss 327 has a size that can accommodate a coil spring 329 that is large enough to surround the sleeve 321. Therefore, the coil spring 32
9 is in contact with the shoulder 328 of the worm 325 at its end 329a. A boss 33 is located in the groove 324 of the sleeve 321 inside the worm 325.
0, a journal-shaped member 3 consisting of a flange 331
40 are fitted, and a slot 322 is formed extending parallel to the axis of the journal-like member 340 over the entire length of the boss and flange. As shown in FIG. 3, the boss portion 330 of the journal-like member 340 is connected to the coil spring 32
It has a substantially conical shape with an end portion 329b of 9 disposed around the periphery.

The end 329a of the spring 329 is the shoulder 328
Since the end portion 329b of the spring 329 is substantially fixed in the axial direction, the spring 329 causes the teeth 327a of the worm 325 to retain the elastic force, while the teeth 327a and the teeth of the sleeve 321 323. At its opposite end 329b, the coil spring 329 has a conical boss 330
This serves to reduce the size of the slot 332 by pressing the journal 340 disposed around the sleeve 321, thereby firmly engaging the journal 340 within the groove 324 of the sleeve 321. Therefore, on the one hand, the coil spring 329
340 from the groove 324 by rising up the conical surface of the boss 330.
acts to prevent separation, thereby providing a tightening action that more securely engages the journal-like member 340 with the groove 324. On the other hand, at the same time, the end 329a
is brought into contact with the shoulder portion 328 of the worm 325 and serves to engage the teeth 327a between the teeth 323 of the sleeve 321.

Due to the rotation of the drive shaft 15, the ear portion 3 of the sleeve 321
Since the sleeves 21a, 321b, and 321c are engaged with the spiral groove 16 of the drive shaft 15, the sleeve 321 is rotated. When the sleeve 321 rotates, the teeth 323 on the sleeve 321 surface engage with the teeth 327a on the worm 325 surface to rotate the worm 325, coil spring 329, and journal-shaped member 340. Along with this rotation, the worm screw 333 on the surface of the worm 325 rotates. This worm screw 333 meshes with teeth 334 of a worm gear 335. Worm gear 335 does not rotate anything. Its only purpose is to act as a timing or position controller, and for this reason it
A stopper piece 336 is provided between adjacent teeth 334.

When the drive shaft 15 operates, the worm 325 rotates as described above, and the worm gear 335 rotates due to the engagement between the worm screw 333 and the teeth 334. This is free wheel rotation without actual movement. Finally, the worm screw 33
The end face 333a or the end face 333b (depending on the direction of rotation) of No. 3 comes to engage with the stopper piece 336. At this point, the ears 321a, 321 of the sleeve 321
b, 321c and the groove 16, the sleeve 3
21 will be moved along the drive shaft 15 either to the left or to the right depending on the direction of rotation. With this movement of the sleeve 321, the flange 322 at one end of the sleeve 321 and the flange 331 at the other end of the sleeve 321 are engaged with the wall surface 320a of the holder casing 320, so that the entire tension holder 11 is moved. .

The drive shaft 15 has a sleeve 321 and a worm 32
5. The tension holder 11 remains fixed throughout the rotation carrying the coil spring 329 and the journal-like member 340. However, a mechanism (not shown) inside the louver holder 12 rotates the louver 13. The rotation of the louver 13 in one direction or the other direction is completed just before one end surface 333a or the other end surface 333b of the worm screw 333 engages with the stopper piece 336. Therefore, rotation about its vertical axis is ensured for the vertical louver and at the same time lateral movement is suppressed. On the other hand, immediately after the louver reaches its rotation limit in either direction, the end surfaces 333a and 333b of the worm screw 333
6, the tension holding body 11 starts to move.

The first louver holder 12 fixed to the tension holder 11 moves as the tension holder 11 moves laterally (transversely). When this movement is made in the direction of opening the blind, the tension holder 11 and the corresponding louver holder 12 move. The movement of the louver holder 12 is a movement away from the center of the window, and this movement immediately moves back to the first louver holder 12.
is brought into contact with the next adjacent louver holder 12, thereby moving it axially along the drive shaft. As this movement continues, each successive louver holder 12 is "picked up" and moved in pairs until they are all gathered together at the side edge of the window.

At this time, the drive shaft 15 is
Both holders 11 and 12 are attracted to each group, and the last holder is in contact with the stopper piece, so that these holders 11, 12 cannot move any further. Therefore, if any more force is applied in the direction of this drive shaft, it will be transmitted to the sleeve 321 and try to rotate it further. When this force to continue rotating overcomes the elastic force of the spring 329, the teeth 323 come into sliding contact with the surfaces of the teeth 327a, resulting in a clutch action. When you hear the snapping of these teeth together, you know that the corresponding tension retainer has reached its limit of motion. On the other hand, the other tensile holding bodies need not be at their breaking point at this time. In this case, the drive shaft 15 of the next tension holder will continue to rotate in the same direction until a snapping sound corresponding to reaching the limit of the teeth 327a and 323 passing each other begins to be generated. . When both tension holders 11 exhibit this snapping effect, this indicates that the Venetian blind has reached its limit of outward opening at this point. Similarly, at this point the louvers 13 in both sets of blinds will be in their most closely drawn position on either side of the window.

Here, when the drive shaft 15 is rotated in the opposite direction,
The force that causes the teeth 327a and the teeth 323 to come into sliding contact with each other is no longer applied. On the contrary, warm 32
5 and the free wheel rotation of the worm gear 335 occurs again here. At the same time, a mechanism within the louver holder 12 begins to rotate the louver 13 about a vertical axis. If the drive shaft 15 continues to rotate in this other direction, the louvers 13 will continue to rotate about the vertical axis (albeit in the opposite direction) until a limit is reached. Immediately after the mechanism for rotating the louver around the vertical axis reaches its rotation limit in the other direction, one of the end surfaces 333a or 333b of the worm screw 333 contacts the stopper piece 26 and rotates toward the center in the opposite direction. Start moving the holding body 11.

This central movement of the tension carrier 11 is transmitted along the first louver carrier 12 of each set. On the other hand, each louver holder 12 is brought into contact with a stopper piece 19a on the surface of the spacer member 19, and the spacer member 19 is moved along the louver holder 12. Stopper piece 19a
At the opposite end of each spacer 19 is fixed to the next succeeding louver holder 12 . Therefore, when this next succeeding louver holder 12 is tensioned by the corresponding spacer 19 and the preceding louver holder 12, the louvers 13 are expanded to the desired spacing across the window. Also, when one of the tension holders 11 completes its stroke toward the center, it hits the other louver holder 11, the support holder 14, or a dedicated stop piece. When this limit of movement or feed is reached, the tension holder 11 will no longer move even if the drive shaft 15 is rotated further. Rather,
When this drive shaft 15 is further rotated, the tooth 323
The aforementioned clutch disengagement action between the teeth 327a and the teeth 327a occurs. If both tension holders 11 do not reach the center at the same time, one of them reaches the center first and then the drive shaft 15 is continued to rotate so that the tooth 327a
slides on the tooth 323 surface, and the operator hears the sound made at this time. The operation is continued until this arriving sound is generated at both tension holding bodies 11, and then the rotation of the drive shaft 15 is stopped.

The blind according to the invention not only allows adjustment of the vertical louver around the vertical axis in its extreme positions (open and closed);
The louvers can also be adjusted about the vertical axis between these extreme positions. On the other hand, if the rotation of the louvers about the vertical axis reaches either limit, then the tension holder 11 begins to move along the axis of the drive shaft 15.

The worm 325 is used to properly time the movement of the tension retainer 11 so that the rotations of the louvers about their vertical axes do not overlap.
The gear ratio of the worm gear 335 is made different from the gear ratio of the worm and worm gear for each louver. For example, the drive shaft 15 can have the same worm and the same pitch as the worm 325 at each louver holder. Similarly, louver holder 12 may be provided with a worm gear similar to worm gear 335 to engage a corresponding worm and to support the louver about its vertical axis. The worm gear 335 has 8 to 9 teeth, whereas a similar worm gear of the louver holder 12 may have 5 to 6 teeth. According to such a configuration, the rotation range of the drive shaft 15 is completed with less rotation than the rotation of the worm gear 335 that supports and rotates the louver. Due to this difference in the number of teeth, the louver and the stopper piece 336 are connected to the end surface 33 of the worm 325.
3a, 333b can be rotated to that limit in either direction before engaging one of them.

As is clear from FIG.
It is divided into 22 parts. In the lower portion 122, restraining pieces 124 are provided at specific locations. These restraining pieces 124 are installed at different height positions and are configured to interact with a restraining piece 123 that protrudes laterally from the supporting holder 14. One stopper piece 1 of the lower part 122 of the head rail 10
24 and one stopper piece 123 protruding laterally from the side of the supporting holder 14 cooperate with each other to selectively stop the individual supporting holders 14 while the blind is being opened. The particular point at which each support holder 14 is stopped during opening of this blind is determined by one of the stop piece 124 of the head rail 10 and the cooperating stop piece 123, in this case the stop piece 124 must come into contact with the stopper piece 123 at the same height. Each supporting holder 14 initially has three restraining pieces 123 on its front and rear sides. Among these, the stopper pieces 123 that are unnecessary for a predetermined support holder 14 are removed when the blind is assembled. As shown in FIG. 4, the removed stopper piece is shown in dotted lines. It can be seen that, with respect to the two supporting holders 14 in FIG. 4, the three restraining pieces 123 on the side facing away from the viewer have all been removed.
Furthermore, in FIG. 4, two of the three restraining pieces on the side of each supporting holder 14 facing the viewer are
pieces are also removed. As a result, as shown in the figure, only one restraining piece remains on each of the supporting holders 14. The remaining restraining piece 123 is in each case attached to the support holder 1 facing towards the viewer in FIG.
It's on the side of 4. In one case (left hand support holder 14), the remaining stop piece 123 is in the center.
The stopper piece 123 on the side of the left hand support holder 14 thus cooperates with the stopper piece 124 on the left hand in FIG. On the right surface of the support holder 14 in FIG. 4, facing the viewer, there is only one remaining stopper piece 123 at the bottom. The stopper piece 123 left on the surface of the right-hand support holder 14 cooperates with the stopper piece 124 on the right hand side in FIG. In this way, the support holder 14 on the left hand side in FIG.
is located above the right-hand restraining piece 124, so it can be seen that the right-hand restraining piece 124 in FIG. 4 can slip through. Therefore, the left-hand support holder 14 is not stopped by the right-hand stopper piece 124, but rather by the aligned left-hand stopper piece 124. head rail 10
There are three grooves 124a at different heights on the side wall of the
can be provided. These grooves 124a indicate the positions of the respective restraining pieces 123 on the upper, middle, and lower sides of the surface of the supporting holder 14, and assist in the arrangement of the restricting pieces 124. At the same time, groove 124a provides an aesthetic appearance to the headrail. Support holder 1
It can be seen that with the above arrangement of three potential stopping points on each side of every four, it is possible to provide six different stopping pieces 124 along each half of the drive shaft 15. That is, from the center to the left of the drive shaft 15, six different supporting holders 14 are provided at different stopping points, and similarly, six different supporting holders 14 are provided at different stopping points. It can be provided at the center right with a

Support of the drive shaft 15 by the supporting holder 14 is most necessary when opening the blind. When the blind is in the open position, all the louvers and their associated louver retainers, together with each set of corresponding tension retainers, will be located at the leftmost and rightmost ends of the window, ie, at the end of the drive shaft. At this time, the intermediate support provided by the support holder 14 is most needed. When the blind is closed and the two sets of louvers are brought together in the center of the blind and deployed over the entire length of the drive shaft, the distribution of the louver holders prevents the drive shaft from sagging, thereby allowing the support holder to be stretched between the two so that it is concentrated in the center between the holders.

Each support retainer 14 has a laterally extending ear 114 for sliding relationship with the rail 10. Each support retainer 14 also has two spaced apart vertical walls 125 extending laterally from the drive shaft 15. disk 12
6 has three inwardly extending cam-like members 126a, which engage the three grooves 16 of the drive shaft 15. The two axial end faces of the disc 126 abut against the inner surface of the vertical wall 125 of the casing. This engagement creates a predetermined amount of contact or friction pressure that depends on the axial thickness of the disc 126. The thickness of this disk is somewhat greater than the space between the opposing inner surfaces of vertical wall 125. The overall amount of friction between the disk 126 and the adjacent vertical wall 125 is determined in part by the disk 126
It also depends, in part, on the diameter of the disk and the elasticity of the material surfaces in contact with each other.

Disk 126 represents a slip clutch. When the drive shaft 15 rotates, the support holder 1 rotates in the axial direction of the drive shaft until the support holder 14 hits an obstacle.
Move 4 first. As soon as this support holder 14 hits an obstacle, the force exerted by the disc 126 is applied to the vertical wall 126 adjacent to this disc 126.
25 and rotate the disk 126 relative to the vertical wall 125 of the casing. The drive shaft 15 can therefore continue to rotate even if the supporting holder is driven into an obstacle.

The two tension holders 11 each have a wedge-shaped member 127 on each side, each having a downwardly directed wedge-shaped surface 127a. This wedge-shaped surface 127 is pivotable about a horizontal axis of a stud 128 extending laterally from the drive shaft 15 and outwardly from the tension carrier 11 . On the side facing the next louver holder 12 (the first louver holder 12), the wedge-shaped element 127 has a nose 129 separated from its body by a distance 130. As shown, this nose 129 is joined to the remainder of the wedge-shaped member 127 only in the upper region 129a. Therefore, a predetermined elasticity is imparted to the nose portion 129 by the properties of the molding material and the air 130.

Tension retainer 11 has a rearwardly extending lateral projection 136 which engages upper portion 121 of headrail 10 and is mounted in sliding relation to track 10a.
These lateral projections 136 embrace the first louver holder 12 with one lateral projection 136 disposed on each side of the first louver holder 12. Each louver holder 12 has a track 10 on the side.
A stud bolt 136a is extended to permanently receive the foil 35 that rolls on the wheel a. On the other hand, as shown in FIG. 4, this stud 136a is engaged within the opening 136b of the lateral projection 136 of the tension holder 11.

The nose portion 129 of the wedge-shaped member 127 is connected to this member 127.
is abutted against the adjacent surface of the lateral protrusion 136 so as to be elastically held upward and lifted to the highest level. In this way, the support holder 14 adjacent to the tension holder 11 does not approach the edge 127b of the wedge-shaped member 127, but rather engages and slides under the downwardly inclined surface 127a.

Since the worm 325 also rotates the worm gear 335 as a free wheel during rotation of the drive shaft 15, no axial movement of the tension holder 11 occurs. On the other hand, when the drive shaft 15 rotates within each louver holder 12, the louver 13 is rotated about its axis. In one direction of rotation of the drive shaft 15 , the support holder 14 can also be moved in the axial direction approaching a particular tension holder 11 . As a result, the support holder 14 adjacent to the tension holder 11 slips under the wedge-shaped member 127. The force exerted by the drive shaft 15 on the support holder 14 causes the support holder 14, and in particular its side ears 114, to impede movement between the track 10a and the wedge-shaped member 127. A horizontal component force is generated to wedge the track 10a with the upper web 121a which is parallel to the track 10a. When such movement is obstructed, the horizontal force of the drive shaft 15 on the surface of the supporting holder 14 is converted into a vertical force acting on the surface of the wedge-shaped member 127. In this way, further axial movement of the support holder 14 along the drive shaft 15 is reliably prevented. This friction clutch created by the vertical wall 125 of the casing and the disc 126 is connected to the drive shaft 1
5 rotates the disk 126 along this drive shaft 15 without moving the disk 126 against the vertical wall 1.
It frictionally slides inside 25.

Due to the above-described action of the friction clutch consisting of the disk 126 and the vertical wall 125, the axial drive force component for moving the support holder 14 along the drive shaft 15 is extremely small. Therefore, the inhibiting force of the ear 114 on the wedge surface 127a and the track 10a is similarly small. As a result, the amount of force required to release the inhibited state and move the support holder in the opposite direction is correspondingly reduced.

Support holder 14 adjacent to tension holder 11
When wedged between the track 10a and the wedge-shaped surface 127a, a small applied force is exerted on the first support retainer 14, with one or more additional support retainers 14 being obstructed and restrained. Even if it abuts against the holder 14, it is large enough to prevent axial movement of the supporting holder 14 along the drive shaft 15. This force also, although still small,
5 is sufficient to fix the tension retainer 11 against axial movement during rotation of the louver 13 about the vertical axis.

On the other hand, when the rotation of the louver 13 around the vertical axis is completed, one of the end surfaces 333a or 333b of the worm screw 333 hits the stopper piece 336 due to the continued rotation of the drive shaft 15. The continued rotation of the drive shaft 15 will then cause the tension holder 11 to be moved along this drive shaft 15 in a direction away from the adjacent support holder 14. This movement along the drive shaft 15 frees the wedge-shaped member 127 to move the support holder 14 along the drive shaft 15 in the same direction.

As described above, the movement of the tension holder 11 (and the louver holder 12 which is fixed after the movement thereof) and the support holder 14 is controlled by the corresponding restriction piece 123 on the surface of the support holder 14. This continues until it reaches 124. The movement of both holders 11 and 12 is distributed along the drive shaft 15 at predetermined intervals until the blind is completely opened and all the supporting holders 14 are brought into contact with the stopper pieces 123 and 124. will continue until

When the drive shaft 15 rotates in the opposite direction, the vertical louver of the blind rotates about its vertical axis and at about the same time the support holder 14 moves along the drive shaft 15 towards its center. Become. The tension holding body 11 of each louver set is a worm 3
25 remains fixed, thereby causing the worm gear 334 to rotate until the end face 333a or 333b of the worm screw 333 contacts the stop piece 336 (this only occurs after the completion of rotation of the louver 13), thus causing the tension holder 11 to rotate. Movement towards the center is initiated as described above.

Various modifications are possible to the present invention. for example,
Although the wedge-like member 127 of the tension retainer 11 is shown operating so that its wedge-like surface 127a overhangs the side ears 114 of the support retainer 14, the wedge-like member 127 can be inverted. The same is true. As a result, the elastic ear portion 129
The wedge-shaped member 127 is pushed down and held by the wedging action on the side ears 114 of the support holder 14 until it contacts the track 10a, and at this time the wedge-shaped member 127 is held down by the upwardly inclined surface 127a (due to gravity and the nose 129). This wedges against movement between the parallel member 121a (which is pressed against the track 10a) and the overlapping parallel member 121a. Such changes are made in member 127.
is not shown since there are no other changes other than the inversion of .

Each of the above-mentioned holders includes a spring 329 and a drive shaft 1.
With the exception of 5 and head rail 10, they are preferably made of injection molded plastic. The particular plastic used will depend on its properties and desired functionality. For example, the intermediate support holder 14 should be made of plastic to provide the vertical walls 125 with elasticity.

With the structure as described above, the present invention ensures the relative distance relationship between the louver holder and the tension holder when the support holder moves in the axial direction of the drive shaft. This ensures smooth and stable operation of the Venetian blinds.

[Brief explanation of drawings]

Figure 1 is a partial side view of a vertical louver Venetian blind and the head rail with which it is assembled, Figure 2 is an exploded perspective view of the tension holder mechanism, and Figure 3 is a portion of the entire tension holder assembled. 4 is a partial perspective view of the headrail shown with the first adjacent louver retainer of one tension retainer and showing the two support retainers for the drive shaft; FIG. 10...head rail, 12...louver holder, 13...louver, 14...support holder, 1
5... Drive shaft, 11... Tension holding body, 123...
First restraining piece, 124...second restraining piece.

Claims (1)

[Claims] 1 A head rail, a plurality of louvers, a plurality of louver holders that hold each louver and are movable along the head rail, a drive shaft that moves the louver holder along the head rail, and a drive shaft that moves the louver holder along the head rail. a plurality of support holders for supporting, at least one tension holder for moving the louver holder along the head rail to open and close the blind, and a side portion of the plurality of support holders; a first restraining piece having different installation heights; and a plurality of second restraining pieces having different installation heights and corresponding to the first restraining pieces installed on the supporting holder on the side wall of the head rail. and a restraining piece, configured such that when the tension holding body and the support holding body are engaged, the first and second restraining pieces can come into contact and brake the tension holding body. Vertical type Venetian blinds with a unique feature.